ver. 1.0.0 05-07-2012

USER MANUAL

OPERATION AND USE OF CAR WITH

Diego G3 / NEVO

SEQUENTIAL GAS INJECTION SYSTEM

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Table of contents

1.

STARTING THE ENGINE .................................................................................................................... 3

2.

CONTROL PANEL .............................................................................................................................. 3

2.1

Indication of the current level of gas fuel in the tank (A) ....................................................... 4

2.2

Light sensor (NEVO only) (Fig. 2.2) (D) .................................................................................... 4

2.3

Gas system signaling ................................................................................................................ 4

2.3.1

Errors flashing codes (NEVO only) ................................................................................... 5

2.3.2

Acoustic signalization ...................................................................................................... 5

2.4

Additional control panel messages in NEVO system ............................................................... 6

2.5

Emergency start on gas ........................................................................................................... 6

2.6

Automatic gas level indicator calibration (NEVO only) ........................................................... 7

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A - LED indicator of actual gas level in the tank

B - switch for fuel type selection

C

- status LEDs (working state indication)

D - light sensor

1. STARTING THE ENGINE

Vehicle equipped with Diego G3 / NEVO system normally starts on gasoline. Switching

to gas fuel supply occurs automatically after obtaining the relevant parameters, selected
during the calibration of the system, such as:

coolant / reducer temperature,

the delay time of switching petrol → gas,

engine speed (RPM) set for switching.

2. CONTROL PANEL

Driver uses control panel to communicate with Diego G3 (

Fig. 2.1

) / NEVO (

Fig. 2.2

) gas ECU.

Panel implements following tasks:

1. Fuel type select – pressing button (B) causes the transition from one fuel to another

(petrol - gas - petrol)

2. Working state indication (C).

A

- LED indicator of actual gas level

in the tank

B - switch for fuel type selection

C - status LEDs (working state
indication)

Fig. 2.1 Diego G3 control panel.

Fig. 2.2 NEVO control panel.

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Work on petrol – gas system is completely shut down, the panel is completely blank - no
lights are flashing.

Work on petrol with automatic switching to gas – flashing blue or red status LED. System
waits for switching parameters (software configurable).

Work on gas – permanently illuminated blue or red status LED (selectable during the
calibration of the system).

2.1 Indication of the current level of gas fuel in the tank (A)

Number of illuminated LEDs of gas level display indicates the degree of filling of gas tank:

Diego G3

NEVO

4 green LEDs

3 green LEDs

Full tank

3 green LEDs

2 green LEDs

4

/

5

of tank capacity

2 green LEDs

1 green LED

3

/

5

of tank capacity

1 green LED

flashing red LED

(or 1 green + 1 red LED in older versions)

2

/

5

of tank capacity

Only red LED illumination indicates the status of the reserve - the minimum amount of gas
(about 20% of tank volume).

2.2 Light sensor (NEVO only) (Fig. 2.2) (D)

Depending on the ambient light controller automatically adjusts the brightness of the

panel (configurable option in the program).

2.3 Gas system signaling

Sequential gas injection system Diego G3 / NEVO has the function of self-control,

allowing to detect malfunctions of the gas installation. All errors are stored in the ECU, and
most of them are indicated on the control panel. Errors are indicated by alternate flashing of
the red and blue LEDs with an acoustic signal. In NEVO system errors are additionally
indicated by flashing the gas level LEDs (only when this option is activated). The most
common cause of the error signal is no gas in the tank. Deleting this alarm require pressing
the fuel type select button.

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2.3.1 Errors flashing codes (NEVO only)

NEVO errors codes list (code, description, flashing code):

Code

Description

Red

Gree

n

Gree

n

Gree

n

E001-E008

Petrol injector no signal cyl 1..8.

E009-E016

Gas injector malfunction cyl 1..8.

E017

Tred sensor short.

E018

Tred sensor open.

E019

Tgas sensor short.

E020

Tgas sensor open.

E021

Valve short.

E022

Valve open.

E023

Low gas pressure.

E024

Reducer too cold.

E025

Petrol injectors merged.

E026

Gas injectors merged.

E027

Gas temperature too high.

N/A

E028

Control panel malfunction.

N/A

E029

Sensor unit malfunction.

N/A

E030

High ECU temperature.

N/A

E031

Low ECU voltage.

N/A

2.3.2 Acoustic signalization

In addition to the light signals which are displayed on the control panel, the gas system also
indicates individual events using acoustic signals:

a) Each fuel type change button press is indicated by an sound signal.
b) If you run out of gas in the tank or the gas pressure in the gas injectors drops system

will automatic return from the gas supply to petrol and the driver will hear a beep -
turned off by pressing the button on the panel once (system remains in standby
mode - alternately flashing two LEDs - blue and red). In that state, after refueling the
car on gas station system automatically switches to gas supply. Another push of the
button on the panel will switch from gas supply to gasoline permanently – in this
state each engine start generates three beeps to remind that the system remained in
operation on gasoline (it is possible to disable this feature using the software for gas
ECU) and the system will not switch to gas.

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c) Gas ECU may also indicate the fact that the car has reached the distance from the last

inspection (configurable from the program) and another visit in the workshop is
required. This information is generated immediately after switching system to the
gas (once for each engine start) in the form of the 10 short sounds at intervals of 0.5
seconds.

2.4 Additional control panel messages in NEVO system

In a state of waiting for switching parameters, system may inform on level indicating

LEDs about time left to gas switching. Sequentially illuminate LEDs indicate the status of
warm up the engine (the regulator). All level LEDs pulsing mean that the car reached the
switching temperature.

2.5 Emergency start on gas

In case of petrol fuel system failure installed Diego G3 / NEVO system allows you to

start the engine directly on the gas. Procedure is as follows:

1. Turn the ignition on.
2. Switch system to petrol.
3. Turn the ignition off.
4. Turn the ignition on.
5. Press and hold button on the Control panel for about 10 seconds. State diode is

blinking and buzzer is beeping. After that time the gas ECU opens the valves and the
state diode on Control panel is constantly on (buzzer stops beeping).

6. Start the engine.

After emergency start (directly on the gas) before you start driving, wait for the temperature
of the engine to raise to about 50 C to ensure sufficient heating of the reducer.

WARNING!

The reducer / environment temperature should not be less than 0 C, as this

may cause difficulties in getting the vehicle to run on the gas, as well as generate a safety
hazard. Therefore, this feature should be used only in exceptional circumstances! Frequent
use of this mode (more than 50 times) will block the possibility of an emergency engine start
directly on the gas fuel. It will also determine the need the workshop in order to unlock the
ECU functions. In the case of incorrect 12 V "after the ignition" signal connection the
function may be disabled.

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2.6 Automatic gas level indicator calibration (NEVO only)

This process allows you to automatically configure the full range of gas level indication

on the panel driver. Prior to calibration, it is necessary to select the right type of gas level
sensor.
Automatic calibration should be performed during the refueling of empty gas tank. The
whole procedure is as follows:

1. Turn the ignition on.
2. Switch system to petrol.
3. Turn the ignition on.
4. Turn the ignition off.
5. Press the button on the control panel, and hold for about 15 seconds. After about 10

seconds the ECU switches the valves and indicates working on gas (the same situation
as in the case of emergency start on gas). After about 5 seconds after the gas valve
opening (the button is still pressed) panel will indicate the calibration mode of the
gas level indicator – gas level LEDs flash alternately.

6. Turn the ignition off.
7. Fuel the gas tank.
8. Turn the ignition on.
9. Wait until the panel stops indicating the calibration mode.

Calibration finished.

WARNING! If panel indicates wrong fuel level after calibration it could mean that it was
made improperly – repeat the process before next refueling.